On 4/5/07, Riccardo Corradini wrote: > Hi all, > I searched something similar for octave2.9.10 of > Polynomial Toolbox http://polyx.com, but unfortunately > I didn't find anything. > In particular I would like to use rmf2lmf routine. > Is there something similar in gnu octave? > Thanks a lot to all of you. > Cheers > Riccardo
Can you describe what your function does? Maybe it exists in another form.
-Muthu
Sure
This is taken from OnLineManual.pdf at page 107
Left and right polynomial matrix fractions Given a left polynomial fraction
Ql−1Pl there always exists a right fraction Pr Qr−1 so that Ql−1Pl = Pr Q r−1 The polynomial matrices Pr and Qr are highly nonunique because if T is any square nonsingular polynomial matrix of the same size as Qr then (Pr T )(Qr T )−1 = Pr Q
r−1 Left and right polynomial matrix fractions Polynomial matrix fractions and LTI systems The Polynomial Toolbox routine lmf2rmf, rmf2lmf [Pr,Qr] =
lmf2rmf(Pl,Ql) converts the left fraction Ql−1Pl to the right fraction Pr Qr−1 such that Pr and Qr are coprime. Similarly, the routine [Pl,Ql] = rmf2lmf(Pr,Qr) converts a (not necessarily coprime) right fraction to a coprime left fraction. Conversion of the left fraction Ql−1Pl of the previous example to the right fraction Example Pr Qr−1 results in [Rr,Qr] = lmf2rmf(Pl,Ql) Constant polynomial matrix:
1-by-1 Rr = 1 Constant polynomial matrix: 1-by-1 Qr = 1 see http://polyx.com/download/OnLineManual.pdf.gz What do you think ? Is there an equivalent in Octave 2.9.10+? Cheers Riccardo
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